package PenTest.alibaba.ACM0407;

import java.util.Scanner;
import java.util.Stack;

public class ACM1 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.nextLine();
        String[][] ch = new String[n][n];
        for (int i = 0; i < n; i++) {
            String[] c1 = sc.nextLine().split(" ");
        }

    }
}
